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Truss high-altitude bulk method for carrying out temporary pre-tensioning on truss lower chord without support
According to the high-altitude bulk method for the truss, no support is arranged on the lower chord of the truss, and temporary pre-tensioning is carried out. Comprising a node plate (3), a screw jack (2), a side-span channel steel pull rod (4) and a midspan channel steel pull rod (5). And the truss lower chord (1.1) is jacked up by the screw jack (2) to be pre-tensioned, and then the truss lower chord (1.1), the truss upper chord vertical web member (1.2) and the truss diagonal web member (1.3) are sequentially mounted, so that the high-altitude bulk loading of the truss (1) is completed. And finally, the screw jack (2) slowly retracts in multiple stages until tensioning on the truss lower chord member (1.1) is completely released, so that tensioning unloading of the truss (1) is completed. According to the method, simple tensioning measures are set to pre-tension the lower chord of the truss, the gradually-increased stress and bending deformation of the lower chord caused by no supporting measures during high-altitude bulk packing of the truss are controlled, the installation precision of the truss is improved, and the construction process is safe and reliable.
本发明是一种在桁架下弦不设支撑并进行临时预张拉的桁架高空散装方法；包括在桁架下弦杆（1.1）的底部设置张拉措施，包含节点板（3）、螺旋千斤顶（2）和跨边槽钢拉杆（4）和跨中槽钢拉杆（5）。用螺旋千斤顶（2）顶起使桁架下弦杆（1.1）进行预张拉，然后按顺序安装桁架下弦杆（1.1）、桁架上弦杆竖腹杆（1.2）、桁架斜腹杆（1.3），以完成桁架（1）的高空散装。最后使螺旋千斤顶（2）缓慢分多级缩回，直至完全放松对桁架下弦杆（1.1）的张拉，以完成对桁架（1）的张拉卸载。该方法设置简单的张拉措施对桁架下弦杆进行预张拉，控制了桁架高空散装时无支撑措施导致下弦杆逐渐增大的应力及弯曲变形，提高了桁架安装精度，施工过程安全可靠。
Truss high-altitude bulk method for carrying out temporary pre-tensioning on truss lower chord without support
According to the high-altitude bulk method for the truss, no support is arranged on the lower chord of the truss, and temporary pre-tensioning is carried out. Comprising a node plate (3), a screw jack (2), a side-span channel steel pull rod (4) and a midspan channel steel pull rod (5). And the truss lower chord (1.1) is jacked up by the screw jack (2) to be pre-tensioned, and then the truss lower chord (1.1), the truss upper chord vertical web member (1.2) and the truss diagonal web member (1.3) are sequentially mounted, so that the high-altitude bulk loading of the truss (1) is completed. And finally, the screw jack (2) slowly retracts in multiple stages until tensioning on the truss lower chord member (1.1) is completely released, so that tensioning unloading of the truss (1) is completed. According to the method, simple tensioning measures are set to pre-tension the lower chord of the truss, the gradually-increased stress and bending deformation of the lower chord caused by no supporting measures during high-altitude bulk packing of the truss are controlled, the installation precision of the truss is improved, and the construction process is safe and reliable.
本发明是一种在桁架下弦不设支撑并进行临时预张拉的桁架高空散装方法；包括在桁架下弦杆（1.1）的底部设置张拉措施，包含节点板（3）、螺旋千斤顶（2）和跨边槽钢拉杆（4）和跨中槽钢拉杆（5）。用螺旋千斤顶（2）顶起使桁架下弦杆（1.1）进行预张拉，然后按顺序安装桁架下弦杆（1.1）、桁架上弦杆竖腹杆（1.2）、桁架斜腹杆（1.3），以完成桁架（1）的高空散装。最后使螺旋千斤顶（2）缓慢分多级缩回，直至完全放松对桁架下弦杆（1.1）的张拉，以完成对桁架（1）的张拉卸载。该方法设置简单的张拉措施对桁架下弦杆进行预张拉，控制了桁架高空散装时无支撑措施导致下弦杆逐渐增大的应力及弯曲变形，提高了桁架安装精度，施工过程安全可靠。
Truss high-altitude bulk method for carrying out temporary pre-tensioning on truss lower chord without support
在桁架下弦不设支撑并进行临时预张拉的桁架高空散装法
CHEN HUI (author) / HUANG QIANG (author) / ZHONG MING (author) / MA HONGYUN (author) / CHEN JINYUE (author) / LU HAIQI (author)
2023-02-24
Patent
Electronic Resource
Chinese
High-altitude operation platform arranged on lower chord of truss and building method thereof
| European Patent Office | 2021
| European Patent Office | 2015